The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Inventory Sequence in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 641st Babafaba 742 78 2ms 14 Oct 2025 642nd MichalMarsalek 🇨🇿 742 89 359ms 20 Nov 2022 643rd snoozingnewt 🇨🇦 739 84 2ms 13 Oct 2025 644th anter69 🇭🇺 738 49 42ms 9 Feb 2023 645th rucin93 🇵🇱 736 53 133ms 6 Dec 2024 646th vishwathg 736 67 29ms 4 Feb 2023 646th Yewzir 🇧🇪 736 67 15ms 7 Feb 2024 646th wh3n3v3r 🇨🇿 736 67 14ms 14 Nov 2024 646th jamesthekee 736 67 14ms 25 Jan 2025 650th klixel 🇨🇦 735 104 394ms 17 Oct 2024 651st MeWhenI 🇻🇦 735 197 13ms 1 Aug 2023 652nd JRaspass 🇬🇧 734 44 2ms 20 Nov 2022 653rd frankgraziano 733 51 136ms 27 Feb 2025 654th blaztoma 🇱🇹 733 90 3,296ms 2 Sep 2025 655th namelessiw 732 64 367ms 5 Mar 2024 655th rucin93 🇵🇱 732 64 348ms 31 May 2025 657th edsrzf 🇳🇿 732 81 24ms 17 Jan 2025 658th kg583 🇺🇸 731 85 17ms 19 days ago 659th Shanethegamer 🇺🇸 730 55 6ms 22 Nov 2022 659th snoozingnewt 🇨🇦 730 55 2ms 13 Oct 2025 661st msbranicky 729 103 318ms 10 Jan 2024 662nd blaztoma 🇱🇹 728 89 96ms 17 Aug 2025 663rd MeWhenI 🇻🇦 728 129 29ms 5 Jun 2023 664th emgordon154 727 122 111ms 19 days ago 665th ovs-code 🇩🇪 726 95 28ms 2 Jul 2024 666th MichalMarsalek 🇨🇿 725 68 20ms 20 Nov 2022 666th jmerle 🇳🇱 725 68 22ms 11 Jul 2023 668th emgordon154 725 91 3,177ms 28 Oct 2024 669th TFeld00 🇩🇰 723 50 39ms 3 Sep 2024 670th KatieLG 🇬🇧 723 53 948ms 3 Jan 2024 671st Shanethegamer 🇺🇸 722 86 8ms 23 Nov 2022 671st blaztoma 🇱🇹 722 86 2ms 2 Sep 2025 673rd Stockoh 🇫🇷 721 65 378ms 24 Jun 2024 673rd JunkIce 721 65 398ms 13 Feb 2025 673rd TheZwierzLF 🇵🇱 721 65 356ms 13 days ago 676th MeWhenI 🇻🇦 721 92 16ms 21 May 2023 677th annaproxy 721 106 60ms 23 Jan 2023 677th Babafaba 721 106 2,228ms 14 Oct 2025 679th angel-p57 🇯🇵 721 236 5ms 7 Dec 2023 680th Shanethegamer 🇺🇸 720 57 246ms 19 Nov 2022 681st Shanethegamer 🇺🇸 716 77 125ms 22 Nov 2022 682nd ovs-code 🇩🇪 715 65 74ms 19 Sep 2023 683rd andre-lameirinhas 🇵🇹 715 69 14ms 23 Feb 2023 683rd jtaxen 715 69 16ms 30 Mar 2024 683rd FranklinJiaChen 715 69 38ms 5 Aug 2024 686th Irratix 🇳🇱 715 81 2ms 11 Dec 2022 687th snoozingnewt 🇨🇦 714 133 269ms 13 Oct 2025 688th kg583 🇺🇸 712 73 26ms 27 Dec 2024 688th CLOStrophobic 🇮🇹 712 73 25ms 18 Feb 2025 690th MeWhenI 🇻🇦 711 118 1,245ms 14 Jun 2023 691st anter69 🇭🇺 710 54 971ms 24 Feb 2023 692nd edsrzf 🇳🇿 710 93 369ms 20 Jun 2025 693rd blaztoma 🇱🇹 710 121 122ms 2 Sep 2025 694th SirBogman 🇺🇸 708 38 204ms 20 Nov 2022 695th postie77 708 106 342ms 19 May 2023 696th msbranicky 708 108 53ms 10 Jan 2024 697th Jacob385 708 112 440ms 27 Oct 2025 698th trinityy-7 706 70 14ms 17 Mar 2024 699th klixel 🇨🇦 706 82 2ms 17 Oct 2024 700th Steffan153 🇫🇮 706 88 34ms 20 Feb 2024 700th albanian-laundromat 706 88 25ms 22 Jul 2025 702nd albanian-laundromat 706 205 12ms 26 Sep 2025 703rd DialFrost 🇸🇬 705 69 338ms 31 Jul 2024 704th b10011 🇫🇮 705 70 16ms 9 Jan 2023 704th Just4FunCoder 705 70 40ms 23 Mar 2023 704th knutae 🇳🇴 705 70 14ms 29 Dec 2023 704th wobblybits 705 70 14ms 18 Aug 2025 704th jacekwladzinski 705 70 27ms 4 Oct 2025 709th RockOfStone 705 88 2ms 9 Mar 2024 710th MeWhenI 🇻🇦 702 46 2ms 15 Apr 2023 711th blaztoma 🇱🇹 702 70 89ms 17 Aug 2025 712th Yewzir 🇧🇪 699 67 371ms 7 Feb 2024 713th msbranicky 699 123 117ms 19 Sep 2023 714th ovs-code 🇩🇪 697 56 132ms 3 Aug 2024 715th blaztoma 🇱🇹 697 89 38ms 16 Aug 2025 716th Shanethegamer 🇺🇸 697 93 212ms 21 Apr 2025 717th blaztoma 🇱🇹 697 124 26ms 2 Sep 2025 718th akshatj27 🇦🇶 696 71 13ms 12 Dec 2022 719th ovs-code 🇩🇪 696 94 11ms 18 Jul 2023 720th HumanoidCPU 695 52 52ms 26 Jun 2024 First Prev 641–720 of 1,615 Next Last